Chapter 13.

Working with Templates

A template is a reusable configuration for virtual machines. When users launch VMs, they can choose from a list of templates in CloudPlatform.

Specifically, a template is a virtual disk image that includes one of a variety of operating systems, optional additional software such as office applications, and settings such as access control to determine who can use the template. Each template is associated with a particular type of hypervisor, which is specified when the template is added to CloudPlatform.

CloudPlatform ships with a default template. In order to present more choices to users, CloudPlatform administrators and users can create templates and add them to CloudPlatform.

13.1. Creating Templates: Overview

CloudPlatform ships with a default template for the CentOS operating system. There are a variety of ways to add more templates. Administrators and end users can add templates. The typical sequence of events is:

1.Launch a VM instance that has the operating system you want. Make any other desired configuration changes to the VM.

2.Stop the VM.

3.Convert the volume into a template.

There are other ways to add templates to CloudPlatform. For example, you can take a snapshot of the VM's volume and create a template from the snapshot, or import a VHD from another system into CloudPlatform.

The various techniques for creating templates are described in the next few sections.

13.2. Requirements for Templates

•For XenServer, install PV drivers / Xen tools on each template that you create. This will enable live migration and clean guest shutdown.

•For vSphere, install VMware Tools on each template that you create. This will enable console view to work properly.

13.3. Best Practices for Templates

If you plan to use large templates (100 GB or larger), be sure you have a 10-gigabit network to support the large templates. A slower network can lead to timeouts and other errors when large templates are used.

13.4. The Default Template

CloudPlatform includes a CentOS template. This template is downloaded by the Secondary Storage VM after the primary and secondary storage are configured. You can use this template in your production deployment or you can delete it and use custom templates.

The root password for the default template is "password".

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Citrix Systems 4.2 manual Working with Templates, Creating Templates Overview, Requirements for Templates, Default Template
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4.2 specifications

Citrix Systems, a leading provider of virtualization solutions and cloud computing technologies, released version 4.2 of its popular software, Citrix XenApp, which was previously known as Presentation Server. This version marked a significant evolution in providing users with remote access to applications and desktops, emphasizing simplicity, performance, and security.

One of the standout features of Citrix XenApp 4.2 is its improved application streaming capabilities. This technology allows applications to be delivered to users in real-time, reducing the need for extensive local installations and enhancing the user experience. With application streaming, administrators can efficiently manage applications on a central server while ensuring that users have immediate access to the necessary tools.

Another highlight of this version is the enhanced security measures put in place to protect sensitive data. Citrix XenApp 4.2 includes support for SSL encryption, providing a secure communication channel for data transmitted between the server and clients. This is particularly crucial for businesses that need to comply with strict data protection regulations. Additionally, the integration of endpoint security features ensures that unauthorized access to applications is minimized.

Performance enhancements are also a critical focus in this release. Citrix optimized the delivery of applications over various network conditions, ensuring that users experience minimal latency regardless of their location. This was achieved through the incorporation of SmartAccess and SmartControl technologies, which allow administrators to set policies based on user roles, device types, and network conditions. This level of granularity enables organization-wide security without compromising on usability.

The user experience was further improved with a revamped interface, making it easier for end-users to access their applications and data. Simplified menus, clear navigation paths, and the ability to customize user settings contributed to a more efficient workflow, allowing users to focus on their tasks rather than struggling with the software.

Finally, Citrix XenApp 4.2 was designed to be highly scalable. Organizations of all sizes could deploy this solution to deliver applications efficiently, adapting to their specific needs as their user base grows or changes. This flexibility is crucial for businesses looking to future-proof their IT investments while maintaining optimal performance.

In summary, Citrix XenApp 4.2 stands out with its enhanced application streaming, robust security features, improved performance under varying conditions, user-friendly interface, and scalability, making it an ideal choice for organizations seeking to leverage virtualization for remote access to applications and desktops.
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